Essential Bioinformatics Resources for Designing PCR Primers and Oligos for Various Applications Please complete the workshop sign-in form. Essential Bioinformatics Resources for Designing PCR Primers and Oligos for Various Applications Yi-Bu Chen, Ph.D. Bioinformatics Specialist Norris Medical Library University of Southern California 323-442-3309 yibuchen@belen.hsc.usc.edu Workshop Outline A. The General Rules for PCR Primer Design B. Resources for General Purpose PCR Primer Design C. Resources for Real-Time q-PCR Primer Design D. Resources for Site-Directed Mutagenesis PCR Primer Design E. Resources for PCR Primers/Oligos Quality Analysis F. Resources for Multiplex PCR Primer Design G. Resources for Microarray Probes Design H. Resources for SNPs and Genotyping PCR Applications I. Resources for Degenerate PCR Primer Design J. Resources Methylation PCR Primer Design PCR: the technology that changed the world we knew The Polymerase Chain Reaction (PCR) revolutionized life sciences as it provides a sensitive, reliable, efficient, and convenient means of amplifying relatively large quantities of DNA Invented in 1983 by Kary Mullis, who won a Nobel Prize 1993 The technique was made possible by the discovery of Taq polymerase, the DNA polymerase that is used by the bacterium Thermus aquaticus, discovered in hot springs. The primary materials used in PCR: - DNA nucleotides: the building blocks for the new DNA - Template DNA: the DNA sequence that you want to amplify - Primers: single-stranded short DNA (16--50 nucleotides long) that are complementary to a short region on either end of the template DNA - DNA polymerase: a heat stable enzyme that catalyzes the synthesis of new DNA Primers dictate the successfulness of a PCR Specificity? Proper annealing to the template? Before you design your own primers – Don’t reinvent the wheels! Before you start designing primers – Find and use the right resources! What are the primers for? General purpose amplification? SNPs detection/validation? Methylation study? Real-time PCR? Microarray probes? Degenerate PCR? Multiplex PCR? What do you have to begin with? Single DNA/protein sequence? Multiple DNA/protein sequence files? GenBank ID/Gene ID/Gene Symbol/rsSNP ID? After you have your primers designed – Consider a second opinion! Most likely your primers can be designed by several different software Different software may vary significantly in: Concepts and overall approaches Designing criteria and default settings Comprehensiveness Usability Accessibility and speed Consider a second opinion when You are new to such design task/application You don’t have a lot of confidence in the initial result General rules for primer design -- Primer and amplicon length Primer length determines the specificity and significantly affect its annealing to the template Too short -- low specificity, resulting in non-specific amplification Too long -- decrease the template-binding efficiency at normal annealing temperature due to the higher probability of forming secondary structures such as hairpins. Optimal primer length 18-24 bp for general applications 30-35 bp for multiplex PCR Optimal amplicon size 300-1000 bp for general application, avoid > 3 kb 50-150 bp for real-time PCR, avoid > 400 bp General rules for primer design -- Melting temperature (Tm) Tm is the temperature at which 50% of the DNA duplex dissociates to become single stranded Determined by primer length, base composition and concentration. Also affected by the salt concentration of the PCR reaction mix Working approximation: Tm=2(A+T)+4(G+C) (suitable only for 18mer or shorter). Optimal melting temperature 52°C-- 60°C Tm above 65°C should be generally avoided because of the potential for secondary annealing. Higher Tm (75°C-- 80°C) is recommended for amplifying high GC content targets. Primer pair Tm mismatch Significant primer pair Tm mismatch can lead to poor amplification Desirable Tm difference < 5°C between the primer pair General rules for primer design -- Specificity and cross homology Specificity Determined primarily by primer length as well as sequence The adequacy of primer specificity is dependent on the nature of the template used in the PCR reaction. Cross homology Cross homology may become a problem when PCR template is genomic DNA or consists of mixed gene fragments. Primers containing highly repetitive sequence are prone to generate nonspecific amplicons when amplifying genomic DNA. Avoid non-specific amplification BLASTing PCR primers against NCBI non-redundant sequence database is a common way to avoid designing primers that may amplify nontargeted homologous regions. Primers spanning intron-exon boundaries to avoid non-specific amplification of gDNA due to cDNA contamination. Primers spanning exon-exon boundaries to avoid non-specific amplification cDNA due to gDNA contamination. General rules for primer design -- GC content; repeats and runs Primer G/C content Optimal G/C content: 45-55% Common G/C content range: 40-60% Runs (single base stretches) Long runs increases mis-priming (non-specific annealing) potential The maximum acceptable number of runs is 4 bp Repeats (consecutive di-nucleotide) Repeats increases mis-priming potential The maximum acceptable number of repeats is 4 dinucleotide General rules for primer design -- Primer secondary structures Hairpins Formed via intra-molecular interactions Negatively affect primer-template binding, leading to poor or no amplification Acceptable ΔG (free energy required to break the structure): >-2 kcal/mol for 3’end hairpin; >-3 kcal/mol for internal hairpin; Self-Dimer (homodimer) Formed by inter-molecular interactions between the two same primers Acceptable ΔG: >-5 kcal/mol for 3’end self-dimer; >-6 kcal/mol for internal self-dimer; Cross-Dimer (heterodimer) Formed by inter-molecular interactions between the sense and antisense primers Acceptable ΔG: >-5 kcal/mol for 3’end cross-dimer; >-6 kcal/mol for internal cross-dimer; General rules for primer design -- GC clamp and max 3’ end stability GC clamp Refers to the presence of G or C within the last 4 bases from the 3’ end of primers Essential for preventing mis-priming and enhancing specific primer-template binding Avoid >3 G’s or C’s near the 3’ end Max 3’end stability Refers to the maximum ΔG of the 5 bases from the 3’end of primers. While higher 3’end stability improves priming efficiency, too higher stability could negatively affect specificity because of 3’-terminal partial hybridization induced non-specific extension. Avoid ΔG < -9. General rules for primer design -- Annealing temperatures and other considerations Ta (Annealing temperature) vs. Tm Ta is determined by the Tm of both primers and amplicons: optimal Ta=0.3 x Tm(primer)+0.7 x Tm(product)-25 General rule: Ta is 5°C lower than Tm Higher Ta enhances specific amplification but may lower yields Crucial in detecting polymorphisms Primer location on template Dictated by the purpose of the experiment For detection purpose, section towards 3’ end may be preferred. When using composite primers Initial calculations and considerations should emphasize on the templatespecific part of the primers Consider nested PCR http://www.hsls.pitt.edu/guides/genetics/obrc http://www.usc.edu/hsc/nml/lib-services/bioinformatics/index.html http://search.hsls.pitt.edu/vivisimo/cgi-bin/query-meta?input-form=molbio-simple&query=pcr+primer&v%3Asources=OBRC&v%3Aproject=molbio Resources for General Purpose PCR Primer Design Primer3 Primer3Plus PrimerZ PerlPrimer Vector NTI Advantage 10 General Purpose PCR Primer Design Tool– Primer3 Name Type Key Functions Publication Info Times Cited Pros Cons Note YiBu’s Rating Primer3 -- an online tool for PCR primer design Web-based software Design PCR primers and hybridization probes. Methods Mol Biol 2000 823 The original and most widely used PCR primer design program; uses sequence as input; a huge number of options for customizing primer design; busy interface; In OBRC; the program has been widely adopted by many primer design software. 4 out of 5 Web Site: http://frodo.wi.mit.edu/cgi-bin/primer3/primer3_www.cgi More Info: http://www.hsls.pitt.edu/guides/genetics/obrc/dna/pcr_oligos/URL1043858198/info General Purpose PCR Primer Design Tool– Primer3Plus Name Type Key Functions Publication Info Times Cited Pros Cons Note YiBu’s Rating Primer3Plus, an enhanced web interface to Primer3 Web-based software Design PCR primers for a given DNA sequence. NAR 2007 N/A Uses sequences or sequence file as input; a huge number of configuration options; automates specific tasks such as designing primers for cloning or stepwise sequencing; primers can be sent to an order form; clean, intuitive and well organized interface; in OBRC. It is an updated, task-oriented web-interface to the original Primer3. 4.5 out of 5 Web Site: http://www.bioinformatics.nl/primer3plus More Info: http://www.hsls.pitt.edu/guides/genetics/obrc/dna/pcr_oligos/URL1191263055/info General Purpose PCR Primer Design Tool– PrimerZ Name Type Key Functions Publication Info Times Cited Pros Cons Note YiBu’s Rating PrimerZ -- streamlined primer design for promoters, exons and human/mouse SNPs Web-based software Design PCR primers for promoters, exons, and human/mouse SNPs Nucleic Acid Research 2007 0 (too new) Uses gene name, Ensembl ID, rs# as input; settings for amplicon region and length, as well as PCR product sizes; allow batch rsSNP processing; frequently updated; offers many advance design settings; interactive results output reported successful rate over 70%; only for human and mouse built on Primer3; in OBRC. 4.5 out of 5 Web Site: http://genepipe.ngc.sinica.edu.tw/primerz/beginDesign.do More Info: http://www.hsls.pitt.edu/guides/genetics/obrc/dna/pcr_oligos/URL1190992855/info General Purpose PCR Primer Design Tool – PerlPrimer Name Type Key Functions Publication Info Times Cited Pros Cons Note YiBu’s Rating PerlPrimer -- cross-platform, graphical primer design for standard, bisulphite and real-time PCR Desktop software (for Windows, Linux and Mac OS-X) Design primers for standard, bisulphite and real-time PCR, and sequencing. Bioinformatics 2004 8 Cross-platform; versatile applications; retrieving sequences from Ensembl as input; QPCR primer design without manual intron-exon boundary entry; BLAST search primers; primer pair quality analysis; ORF and CpG island detection; Requires local installation of the software; automatic sequence retrieval only through Esemble (selected eukaryotic genomes) not NCBI (more comprehensive). In OBRC 4 out of 5 Web Site: http://perlprimer.sourceforge.net/index.html PerlPrimer screenshots: http://perlprimer.sourceforge.net/screenshots.html More Info: http://www.hsls.pitt.edu/guides/genetics/obrc/dna/pcr_oligos/URL1167845497/info General Purpose PCR Primer Design Tool– Vector NTI Advance 10 Name Type Key Functions Publication Info Times Cited Pros Cons Note YiBu’s Rating Vector NTI Advance 10 -- design primers and oligos for regular/multiplex PCR, sequencing, hybridization. Commercial Desktop software (free to nonprofit users) Design PCR primers and oligos for routine molecular applications N/A N/A Uses user sequence, multiple DNA sequence alignment as input; commercial quality features/functions; integrated with other Vector NTI applications; many design settings; analyzes and ranks primer quality; requires software installation/licensing; NML offers workshop and tutorials; in OBRC. 4 out of 5 Web Site for NML Workshop: http://www.usc.edu/hsc/nml/libservices/bioinformatics/vector_nti_advance_10_workshop.html More Info On Vector NTI Advance 10: http://www.usc.edu/hsc/nml/lib-services/bioinformatics/vector_nti_advance_10.html Primer Design Resources for Real-time PCR NCBI Probe Database RTPrimerDB Primer Bank qPrimerDepot PCR-QPPD PerlPrimer Public PCR Primers/Oligo Probes Repository – The NCBI Probe Database Name Type Key Functions Publication Info Times Cited Pros Cons Note YiBu’s Rating NCBI Probe Database Web-based database Search for documented PCR primers and oligo probes for genotyping, gene expression, SNP discovery, gene silencing and genome mapping applications. Unpublished n/a The largest database of its kind; results including information on reagent distributors, probe effectiveness, and computed sequence similarities; Entrez allows search to be limited by applications, probe type, and model organism; n/a 4.5 out of 5 Web Site: Database Overview: http://www.ncbi.nlm.nih.gov/genome/probe/doc/Overview.shtml Database Query Tips: http://www.ncbi.nlm.nih.gov/genome/probe/doc/QueryTips.shtml http://www.ncbi.nlm.nih.gov/sites/entrez?db=probe Resources for real time PCR– RTPrimerDB Name Type Key Functions Publication Info Times Cited Pros Cons Note YiBu’s Rating RTPrimerDB: the real-time PCR primer and probe database Database Search for validated primers and probes used in real-time PCR assays employing popular chemistries (SYBR Green I, Taqman, Hybridisation Probes, Molecular Beacon); map primers/probes onto different transcript variants Nucleic Acids Research 2003, 2006 (update) 62 Primers/probes experimentally validated; search with gene name/symbol, Entrez/Ensembl Gene identifier, SNP ID, or oligo sequence; queries can be limited to a specific application (gene expression, DNA copy number, SNP detection, mutation analysis, fusion gene) or organisms (20); results linked to PubMed record and BLAST; frequently updated; Gene expression assay viewer requires Adobe SVG viewer plug-in, and only available for human, mouse, rat. In OBRC; 3845 real-time PCR assays for 2373 genes as of Nov. 2007. 4.8 out of 5 Web Site: http://medgen.ugent.be/rtprimerdb/ More Info: http://www.hsls.pitt.edu/guides/genetics/obrc/dna/pcr_oligos/URL1099597360/info Resources for real time PCR– Primer Bank Name Type Key Functions Publication Info Times Cited Pros Cons Note YiBu’s Rating A PCR primer bank for quantitative gene expression analysis Web-based database Search for pre-designed transcript-specific PCR primers for genome-scale real time PCR assay Nucleic Acids Research 2003 67 Searchable by GenBank Accession number, gene ID/symbol, keywords etc.; design algorithm extensively tested and validated with success rate of 82.6%; results output containing positions of primers and amplicons in the sequence context of the queried gene Only for human and mouse genes; algorithm not designed to span introns; no graphic display; Contains 306,800 real-time PCR primers for 33741 human genes and 27681 mouse genes as of Nov. 2007 4.8 out of 5 Web Site: http://pga.mgh.harvard.edu/primerbank/ More Info: http://www.ncbi.nlm.nih.gov/sites/entrez?Db=pubmed&Cmd=ShowDetailView&TermToSearch=14654707 Resources for real time PCR– qPrimerDepot Name Type Key Functions Publication Info Times Cited Pros Cons Note YiBu’s Rating qPrimerDepot -- a primer database for quantitative real time PCR Web-based database Provides optimized qRT-PCR primers for all human/mouse RefSeq genes; NAR 2005 19 Uses GenBank RefSeq ID or gene name as input; primers are designed to amplify desired templates under unified annealing temperature; avoids genomic DNA contamination (for intron-bearing genes); simple user interface; Validation results show 70-94% successful rate; Results output without sequence context display of primer/amplicons positions In OBRC; built on Primer3; 4.5 out of 5 Web Site for Human Genes: http://primerdepot.nci.nih.gov/ Web Site for Mouse Genes: http://mouseprimerdepot.nci.nih.gov/ More Info: http://www.hsls.pitt.edu/guides/genetics/obrc/dna/pcr_oligos/URL1174922412/info Resources for real time PCR– QPPD Name Type Key Functions Publication Info Times Cited Pros Cons Note YiBu’s Rating QPPD -- Quantitative PCR Primer Database for human and mouse Web-based database Search for published quantitative/real time RT-PCR primer and probes for studying of human and mouse gene expression. Unpublished n/a All primers were experimentally validated with literature references; uses gene name as input; searches can be limited by different assay types; output includes graphic display of primers/amplicons positions and sizes. Only human and mouse genes available; no user documentations and database stats. In OBRC 4 out of 5 Web Site: http://web.ncifcrf.gov/rtp/GEL/primerdb/default.asp More Info: http://www.hsls.pitt.edu/guides/genetics/obrc/dna/pcr_oligos/URL1152117830/info Resources for real time PCR– PerlPrimer Name Type Key Functions Publication Info Times Cited Pros Cons Note YiBu’s Rating PerlPrimer -- cross-platform, graphical primer design for standard, bisulphite and real-time PCR Desktop software (for Windows, Linux and Mac OS-X) Design primers for standard, bisulphite and real-time PCR, and sequencing. Bioinformatics 2004 8 Cross-platform; versatile applications; retrieving sequences from Ensembl as input; QPCR primer design without manual intron-exon boundary entry; BLAST search primers; primer pair quality analysis; ORF and CpG island detection; Requires local installation of the software; automatic sequence retrieval only through Esemble (selected eukaryotic genomes) not NCBI (more comprehensive). In OBRC 4 out of 5 Web Site: http://perlprimer.sourceforge.net/index.html PerlPrimer screenshots: http://perlprimer.sourceforge.net/screenshots.html More Info: http://www.hsls.pitt.edu/guides/genetics/obrc/dna/pcr_oligos/URL1167845497/info Resources for Site-Directed Mutagenesis PCR – PrimerX Name Type Key Functions Publication Info Times Cited Pros Cons Note YiBu’s Rating PrimerX -- Automated design of mutagenic primers for site-directed mutagenesis Web-based software Design mutagenic primers for site-directed mutagenesis. unpublished n/a Uses either DNA or protein sequences as input; results can be customized for three different commercial mutagenesis kits; straightforward user interface, No data on evaluation and user feedback; In OBRC 4 out of 5 Web Site: http://www.bioinformatics.org/primerx/ More Info: http://www.hsls.pitt.edu/guides/genetics/obrc/dna/pcr_oligos/URL1175091818/info Resources for PCR Primer or Oligo Analysis AutoDimer IDT OligoAnalyzer 3.0 PUNS NCBI BLAST UCSC In-Silico PCR Resources for PCR Primer or Oligo Analysis – AutoDimer Name Type Key Functions Publication Info Times Cited Pros Cons Note YiBu’s Rating AutoDimer -- a screening tool for primer-dimer and hairpin structures Web-based or desktop software Rapidly screen PCR primers for primer-dimer and hairpin interactions in short DNA oligomers (< 30 nucleotides) Biotechniques 2004 17 Suited for screening multiplex PCR primers; output has alignment; Requires manually formatted primers file as input; crude web layout; the webbased version is limited 100 sequences/run and maximum oligomer length of 75 nucleotides or less. In OBRC 4 out of 5 Web Site: http://www.cstl.nist.gov/div831/strbase/AutoDimerHomepage/AutoDimerProgramHomepage.htm More Info: http://www.hsls.pitt.edu/guides/genetics/obrc/dna/pcr_oligos/URL1154964478/info Resources for PCR Primer or Oligo Analysis –IDT OligoAnalyzer 3.0 Name Type Key Functions Publication Info Times Cited Pros Cons Note YiBu’s Rating IDT OligoAnalyzer 3.0 Web-based software Analyze primer/oligo sequence and structure. Unpublished n/a Includes analysis of hairpins, self-dimer, heterodimer; customizable primer/oligo and salt concentrations; many options for various sequence modifications; direct submission for NCBI BLAST; allows direct order of primer/oligo; No evaluation data. 4 out of 5 Web Site: http://www.idtdna.com/analyzer/Applications/OligoAnalyzer/ Online Instruction: http://www.idtdna.com/Analyzer/Applications/Instructions/Default.aspx?AnalyzerInstructions=true Resources for PCR Primer Specificity Analysis – PUNS Name Type Key Functions Publication Info Times Cited Pros Cons Note YiBu’s Rating PUNS -- Transcriptomic- and genomic-in silico PCR for enhanced primer design Web-based or desktop software (Windows, Linux) Use in silico PCR to verify primer specificity by comparing the primers against the entire transcriptome/genome and looking for alternate binding and potential alternate amplicons. Particularly suited for the identification of highly selective primers for quantitative microarray validation; Bioinformatics 2004 4 Focuses on primer specificity analysis; capable of design cross-species primers; uses pre-designed primers as input; good online documentation For specificity check against transcriptome, works only with model organisms whose transcriptome info are available in UniGene; requires special input file format; unnecessary complicated interface; in OBRC 4 out of 5 Web Site: http://okeylabimac.med.utoronto.ca/PUNS/ More Info: http://www.hsls.pitt.edu/guides/genetics/obrc/dna/pcr_oligos/URL1175092441/info Resources for PCR Primer Specificity Analysis – NCBI BLAST http://www.ncbi.nlm.nih.gov/blast/Blast.cgi?PAGE=Nucleotides&PROGRAM=blastn&MEGABLAST=on&BLAST_PROGRAMS=megaBlast&PAGE_TYPE=BlastSearch&SHOW_DEFAULTS=on Resources for PCR Primer Mapping – UCSC In-Silico PCR http://genome.ucsc.edu/cgi-bin/hgPcr?db=mm9 Resources for PCR Primer Mapping/Amplicon Size – SMS Tool http://www.bioinformatics.org/sms2/pcr_products.html http://www.bioinformatics.org/sms2/index.html Please evaluate this workshop to help me improving future presentations: http://www.zoomerang.com/survey.zgi?p=WEB2277FTDR3AJ Have questions or comments about this workshop? Please contact: Yi-Bu Chen, Ph.D. Bioinformatics Specialist Norris Medical Library University of Southern California 323-442-3309 yibuchen@belen.hsc.usc.edu Primer Design Tools for Multiplex PCR MultiPLX PrimerStation Primer Design Tools for Multiplex PCR– MultiPLX Name Type Key Functions Publication Info Times Cited Pros Cons Note YiBu’s Rating MultiPLX -- automatic grouping and evaluation of PCR primers Web-based or desktop software (Windows, Linux) Automatic grouping large number of PCR primers pairs based on analysis of primers properties and compatibilities. Bioinformatics 2005 2 Capable of analyzing thousands of primers; Input requires specially formatted primer file; poor online documentation; 3.5 out of 5 Web Site: http://bioinfo.ebc.ee/multiplx/ More Info: http://www.ncbi.nlm.nih.gov/sites/entrez?cmd=Retrieve&db=pubmed&dopt=AbstractPlus&list_uids=15598831 Primer Design Tools for Multiplex PCR– PrimerStation Name Type Key Functions Publication Info Times Cited Pros Cons Note YiBu’s Rating PrimerStation -- a highly specific multiplex genomic PCR primer design server for the human genome Web-based software Design highly specific and accurate multiplex genomic PCR primer for human genome. NAR 2006 0 (too new) Uses multiple Genbank RefSeq ID or chromosomal coordinates as inputs; allows exon-only amplification; options to avoid SNPs region or CA-repeats; configurable settings for primer design; Only for human genome; In OBRC 4.5 out of 5 Web Site: http://ps.cb.k.u-tokyo.ac.jp/index.html More Info: http://www.hsls.pitt.edu/guides/genetics/obrc/dna/pcr_oligos/URL1154793164/info Resources for Microarray Probe Design NCBI Probe Database OligoWiz 2.0 ROSO YODA Resources for Microarray Probe Design –OligoWiz 2.0 Name Type Key Functions Publication Info Times Cited Pros Cons Note YiBu’s Rating OligoWiz 2.0 -- integrating sequence feature annotation into the design of microarray probes Web-based client-server solution Perform intelligent design of oligonucleotides against a given set of target sequences for DNA microarray application. NAR 2005 8 The input sequence file can be in FASTA or annotation containing tab format; integrated species database for reducing or eliminating cross-hybridizations; in addition to probe selection according to a series of probe quality parameters, cross-hybridization, Tm, position in transcript, probe folding and lowcomplexity, the program facilitates automatic placement of probes relative to the sequence annotation; evaluation study shows consistent hybridization results; decent online user guide; Requires download/install Java-based Graphic User Interface In OBRC 4 out of 5 Web Site: http://www.cbs.dtu.dk/services/OligoWiz2/ More Info: http://www.hsls.pitt.edu/guides/genetics/obrc/gene_expression/microarray_design_probes/URL111876 7631/info Resources for Microarray Probe Design –ROSO Name Type Key Functions Publication Info Times Cited Pros Cons Note YiBu’s Rating ROSO -- Optimizing oligonucleotide probes for microarrays Web-based software Design optimal oligonucleotide probe sets for microarrays. Bioinformatics 2004 23 Uses FASTA formatted file for both targeted cDNA sequences and a facultative external file containing sequences to be avoided in crosshybridization; the facultative files are provided for each model organisms, customized facultative can be uploaded; settings for hybridization conditions and probe secondary structures; No data on evaluation and user feedback; 4 out of 5 Web Site: http://pbil.univ-lyon1.fr/roso/Home.php More Info: http://www.ncbi.nlm.nih.gov/sites/entrez?Db=pubmed&Cmd=ShowDetailView&TermToSearch=14734320 Resources for Microarray Probe Design –YODA Name Type Key Functions Publication Info Times Cited Pros Cons Note YiBu’s Rating YODA -- selecting signature oligonucleotides Desktop software Select signature sequences for microarray and other applications Bioinformatics 2004 15 Cross-platform (Windows, Mac OS X, Linux); relies on a custom sequence similarity search algorithm instead of BLAST to minimize false negatives; supports multiple probe design goals including single-genome, multiplegenome, pathogen-host and species/strain-identification; many configurable parameters; uses FASTA formatted files for both targeted and avoided sequences. Requires download and installation on local PC; no data on evaluation and user feedback; 4 out of 5 Web Site: http://pathport.vbi.vt.edu/YODA/ More Info: http://bioinformatics.oxfordjournals.org/cgi/content/full/21/8/1365 PCR Primer Design Resources for SNPs and Genotyping Purposes NCBI Probe Database PrimerZ MuPlex SNPBox Public PCR Primers/Oligo Probes Repository – The NCBI Probe Database Name Type Key Functions Publication Info Times Cited Pros Cons Note YiBu’s Rating NCBI Probe Database Web-based database Search for documented PCR primers and oligo probes for genotyping, gene expression, SNP discovery, gene silencing and genome mapping applications. Unpublished n/a The largest database of its kind; results including information on reagent distributors, probe effectiveness, and computed sequence similarities; Entrez allows search to be limited by applications, probe type, and model organism; n/a 4.5 out of 5 Web Site: Database Overview: http://www.ncbi.nlm.nih.gov/genome/probe/doc/Overview.shtml Database Query Tips: http://www.ncbi.nlm.nih.gov/genome/probe/doc/QueryTips.shtml PCR Primer Design Resources for SNPs and Genotyping Purposes – PrimerZ Name Type Key Functions Publication Info Times Cited Pros Cons Note YiBu’s Rating PrimerZ -- streamlined primer design for promoters, exons and human/mouse SNPs Web-based software Design PCR primers for promoters, exons, and human/mouse SNPs Nucleic Acid Research 2007 0 (too new) Uses gene name, Ensembl ID, rs# as input; settings for amplicon region and length, as well as PCR product sizes; allow batch rsSNP processing; frequently updated; offers many advance design settings; interactive results output reported successful rate over 70%. built on Primer3; in OBRC. 4.5 out of 5 Web Site: http://genepipe.ngc.sinica.edu.tw/primerz/beginDesign.do More Info: http://www.hsls.pitt.edu/guides/genetics/obrc/dna/pcr_oligos/URL1190992855/info PCR Primer Design Tools for SNPs and Genotyping Purposes– MuPlex Name Type Key Functions Publication Info Times Cited Pros Cons Note YiBu’s Rating MuPlex -- multi-objective multiplex PCR assay design Web-based software Design primers for high-throughput multiplex PCR assays, including genotyping. NAR 2005 7 Input uses FASTA sequence/file; sequence with SNP brackets; allows masked region; results of assay solutions emailed; many design options; No evaluation data In OBRC; build on Primer3 4 out of 5 Web Site: http://genomics14.bu.edu:8080/MuPlex/MuPlex.html More Info: http://www.hsls.pitt.edu/guides/genetics/obrc/dna/pcr_oligos/URL1135006767/info PCR Primer Design Tools for SNPs and Genotyping Purposes– SNPBox Name Type Key Functions Publication Info Times Cited Pros Cons Note YiBu’s Rating SNPbox: a modular software package for large-scale primer design Web-based software Design PCR primers for large-scale amplification and sequencing projects aimed at constructing single nucleotide polymorphisms maps; design of primer sets for mutation analysis, STR marker genotyping and microarray oligos. NAR 2004/Bioinformatics 2005 5 Uses GenBank ID or FASTA sequence file as input; no prior knowledge of rsID needed; many design options; offers SNP; Exon and Saturation module; Interface not well designed; inconsistent server processing speed; requires Adobe SVG viewer web browser plug-in for interactive results visualization. In OBRC; build on Primer3; 3.5 out of 5 Web Site: http://www.snpbox.org/ More Info: http://www.hsls.pitt.edu/guides/genetics/obrc/dna/pcr_oligos/URL1097782408/info Primer Design Tools for Degenerate PCR Primaclade GeneFisher2 CODEHOP Primer Design Tools for Degenerate PCR– Primaclade Name Type Key Functions Publication Info Times Cited Pros Cons Note YiBu’s Rating Primaclade -- a flexible tool to find conserved PCR primers across multiple species Web-based software Design degenerated PCR primers based on conserved regions from a multiple species nucleotide alignment file Bioinformatics 2005 9 Uses a multiple species nucleotide alignment file as input; accepts several alignment format; May not work well when sequences in the alignment are > 29% divergent; does not use IUPAC codes in the input alignment; last updated in 2004 Built on Primer3; in OBRC 4 out of 5 Web Site: http://www.umsl.edu/services/kellogg/primaclade.html More Info: http://www.hsls.pitt.edu/guides/genetics/obrc/dna/pcr_oligos/URL1167846864/info Primer Design Tools for Degenerate PCR– GeneFisher2 Name Type Key Functions Publication Info Times Cited Pros Cons Note YiBu’s Rating GeneFisher2 – an interactive tool for designing degenerate PCR primers flexible tool to find conserved PCR primers across multiple species Web-based software Design degenerated PCR primers based on conserved regions among multiple DNA or protein sequences Proc Int Conf Intell Syst Mol Biol. 1996 38 Uses but does not require pre-aligned sequences; integrated alignment tools to align starting sequences; accepts both DNA and protein sequences; Only accepts FASTA format alignment; no evaluation data; Built on Primer3; 4 out of 5 Web Site: http://bibiserv.techfak.uni-bielefeld.de/genefisher2/ More Info: http://www.ncbi.nlm.nih.gov/sites/entrez?Db=pubmed&Cmd=ShowDetailView&TermToSearch=8877506 Primer Design Tools for Degenerate PCR– CODEHOP Name Type Key Functions Publication Info Times Cited Pros Cons Note YiBu’s Rating CODEHOP (COnsensus-DEgenerate Hybrid Oligonucleotide Primer) PCR primer design Web-based software Design degenerate PCR primers based on multiple protein sequences alignments Nucleic Acids Research 2003 37 Widely cited with many successful applications; settings for genetic code and codon usage; Requires local multiple alignment as input and must be in Blocks Database format; In OBRC 4 out of 5 Web Site: http://blocks.fhcrc.org/codehop.html More Info: http://www.hsls.pitt.edu/guides/genetics/obrc/dna/pcr_oligos/URL1118954832/info Primer Design Resources for Methylation PCR MethPrimer methBLAST and methPrimerDB BiSearch PerlPrimer Primer Design Resources for Methylation PCR– MethPrimer Name Type Key Functions Publication Info Times Cited Pros Cons Note YiBu’s Rating MethPrimer: designing primers for methylation PCRs Web-based software Design primers for methylation-specific, bisulfite-sequencing PCR, or bisulfiterestriction PCR assays. Bioinformatics 2002 123 Widely used; uses DNA sequence in any format as input; no need to modify sequences; very simple interface; settings for primers; output includes graphics and sequence alignment; fast processing n/a Build on Primer3; in OBRC; 4.5 out of 5 Web Site: http://www.urogene.org/methprimer/ More Info: http://www.hsls.pitt.edu/guides/genetics/obrc/dna/pcr_oligos/URL1167846108/info Primer Design Tools for Methylation PCR– methBLAST and methPrimerDB Name Type Key Functions Publication Info Times Cited Pros Cons Note YiBu’s Rating methBLAST and methPrimerDB: web-tools for PCR based methylation analysis Web-based software methPrimerDB for validated PCR primers for DNA methylation analysis; methBLAST for in silico assessment of primer specificity in PCR based methylation assays. BMC Bioinformatics 2006 0 (too new) Search validated primers by gene name with organism limit; in silico PCR using bisulfite converted DNA as input; Only 243 primer sets available in the methPrimerDB (as of Oct. 2007) in OBRC; from the same group of MethPrimer 4 out of 5 methPrimerDB Web Site: http://medgen.ugent.be/methprimerdb/ methBLAST Web Site: http://medgen.ugent.be/methBLAST/ More Info: http://www.biomedcentral.com/1471-2105/7/496 Primer Design Tools for Methylation PCR– BiSearch Name Type Key Functions Publication Info Times Cited Pros Cons Note YiBu’s Rating BiSearch: primer-design and search tool for PCR on bisulfite-treated genomes Web-based software Design primers for both bisulfite-treated and native DNA templates. NAR 2005, BMC Bioinformatics 2006, Methods Mol Biol 2007 8 Uses plain text formatted sequence as input; integrated high-speed ePCR tool for fast detection of mispriming sites and alternative PCR products in cDNA libraries and native or bisulfite-treated genomes; tools for calculating primer Tm and scores; configurable designing/scoring parameters; fast server; ePCR only available for 4 native/bisufite-treated mammalian genomes. 4.5 out of 5 Web Site: http://bisearch.enzim.hu/ More Info: http://www.ncbi.nlm.nih.gov/sites/entrez?Db=pubmed&Cmd=ShowDetailView&TermToSearch=15653630 Primer Design Tools for Methylation PCR– PerlPrimer Name Type Key Functions Publication Info Times Cited Pros Cons Note YiBu’s Rating PerlPrimer -- cross-platform, graphical primer design for standard, bisulphite and real-time PCR Desktop software (for Windows, Linux and Mac OS-X) Design primers for standard, bisulphite and real-time PCR, and sequencing. Bioinformatics 2004 8 Cross-platform; versatile applications; retrieving sequences from Ensembl as input; QPCR primer design without manual intron-exon boundary entry; BLAST search primers; primer pair quality analysis; ORF and CpG island detection; Requires local installation of the software; automatic sequence retrieval only through Esemble (selected eukaryotic genomes) not NCBI (more comprehensive). In OBRC 4 out of 5 Web Site: http://perlprimer.sourceforge.net/index.html PerlPrimer screenshots: http://perlprimer.sourceforge.net/screenshots.html More Info: http://www.hsls.pitt.edu/guides/genetics/obrc/dna/pcr_oligos/URL1167845497/info Please evaluate this workshop to help me improving future presentations: http://www.zoomerang.com/survey.zgi?p=WEB2277FTDR3AJ Have questions or comments about this workshop? Please contact: Yi-Bu Chen, Ph.D. Bioinformatics Specialist Norris Medical Library University of Southern California 323-442-3309 yibuchen@belen.hsc.usc.edu Useful web sites for design degenerate PCR primers http://boneslab.bio.ntnu.no/degpcrshortguide.htm http://info.med.yale.edu/mbb/koelle/protocols/protocol_degenerate_PCR.html http://www.mcb.uct.ac.za//pcroptim.htm#Degenerate http://www.protocol-online.org/prot/Molecular_Biology/PCR/Degenerate_PCR/ http://cgat.ukm.my/protease/degpcr.html